CN114669914A

CN114669914A - Energy-saving low-temperature lead-free soldering paste preparation method and equipment

Info

Publication number: CN114669914A
Application number: CN202210493498.4A
Authority: CN
Inventors: 刘家党; 刘玉洁; 肖东明; 黄家强; 肖大为; 肖涵飞; 肖健; 肖雪; 卢克胜
Original assignee: Shenzhen Tong Fang Electronic New Material Co ltd
Current assignee: Shenzhen Tong Fang Electronic New Material Co ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-06-28
Anticipated expiration: 2042-05-07
Also published as: CN114669914B

Abstract

The invention discloses a method and equipment for preparing energy-saving low-temperature lead-free solder paste, which relates to the field of solder paste preparation and solves the problem that the prior energy-saving low-temperature lead-free solder paste preparation equipment is difficult to accurately control and recycle the filled nitrogen gas for recycling, and comprises a tank body, an aerating device, a switching device and a liftable cover body, wherein the cover body is provided with stirring equipment for stirring raw materials in the tank body, the cover body is fixedly connected with a nitrogen tank, and the cover body is fixedly connected with a vacuum pump for pumping the tank body, so that the method and the equipment for preparing the energy-saving low-temperature lead-free solder paste are convenient for quickly filling the nitrogen gas in the nitrogen tank into the tank body through operation, and the switching device can automatically switch after the aerating device is operated every time, so that the nitrogen gas in the tank body can be accurately pumped into the nitrogen tank for collection in the next pumping process, switch once more after collecting the completion, prevent to take out the air mistake in the jar body and lead to the fact gaseous pollution in the nitrogen gas jar.

Description

Energy-saving low-temperature lead-free soldering paste preparation method and equipment

Technical Field

The invention relates to the technical field of solder paste preparation, in particular to a preparation method and equipment of energy-saving low-temperature lead-free solder paste.

Background

Solder paste, gray paste. Solder paste is a new type of soldering material produced by Surface Mount Technology (SMT) and is a paste mixture formed by mixing solder powder, soldering flux, other surfactants, thixotropic agents, etc. The method is mainly used for welding electronic components such as surface resistance, capacitance, chips and the like of a printed circuit board (PCB for short) in the SMT industry, and along with the development of lightness and thinness of the electronic components, low-temperature assembly becomes a new trend of electronic assembly. Because the low-temperature welding materials required by low-temperature assembly are all based on Sn-Bi series alloy, the difference between the mechanical toughness of a welding spot and the existing high-temperature welding flux is very large, and the reliability and the durability of a finished product are seriously reduced.

The existing energy-saving low-temperature lead-free solder paste is prepared by stirring and mixing solder powder and soldering flux by using a vacuum stirrer, in the mixing process, the vacuum stirring and nitrogen-filled stirring are required to be continuously switched, most of the existing vacuum stirrers do not have the function of gas-filled stirring, meanwhile, in the steps of the method, the states of vacuum and nitrogen-filled are required to be switched for many times, the filled nitrogen can be pumped out by the vacuum stirrer in the subsequent vacuumizing process and is exhausted along with air, the pumped nitrogen cannot be effectively recycled, the production cost is greatly improved, and therefore, the energy-saving low-temperature lead-free solder paste preparation method and equipment are provided.

Disclosure of Invention

The invention aims to provide a method and equipment for preparing energy-saving low-temperature lead-free solder paste, which are convenient for automatically collecting nitrogen, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the preparation method of the energy-saving low-temperature lead-free solder paste comprises the following steps:

s1, weighing rosin, a thixotropic agent, an active agent and a solvent according to the ratio of 5:1:1: 3;

s2, adding a solvent into a container, heating to 150-160 ℃, adding rosin and stirring until the rosin is completely melted, and then adding a thixotropic agent and stirring until the rosin is completely melted;

s3, cooling the system to 120-130 ℃, adding an active agent, stirring until the active agent is completely melted, cooling to obtain a pasty soldering flux, and storing in a 0-10 ℃ refrigeration house for later use;

s4, weighing low-temperature tin-bismuth-silver-copper quaternary lead-free solder powder according to a proportion, wherein the mass percentage of bismuth is 46-52%, the mass percentage of copper is 0.3-1.2%, the mass percentage of silver is 0.4-1.2%, and the mass percentage of tin is 45.6-53.3%, pouring the powder into a vacuum mixer, filling nitrogen gas into the vacuum mixer for preliminary stirring at a low speed for 5-10 minutes, weighing soldering flux according to a proportion, vacuumizing the vacuum mixer for preliminary stirring at a low speed for 5-10 minutes, filling nitrogen gas into the vacuum mixer for preliminary stirring at a medium speed for 25-35 minutes to fully and uniformly mix the tin powder and the soldering flux, and then vacuumizing the vacuum mixer for 5-7 minutes to obtain the solder paste.

A preparation device of an energy-saving low-temperature lead-free solder paste preparation method comprises a tank body, an inflation device, a switching device and a liftable cover body, wherein the cover body is provided with stirring equipment for stirring raw materials in the tank body, the cover body is fixedly connected with a nitrogen tank, the cover body is fixedly connected with a vacuum pump for pumping air into the tank body, the pumping end of the vacuum pump is communicated with the tank body, the inflation device is arranged on the cover body and is used for filling nitrogen in the nitrogen tank into the tank body, the switching device is arranged on the cover body and is used for ensuring that the vacuum pump is started to pump the nitrogen in the tank body into the nitrogen tank for storage after the inflation device is operated to fill nitrogen each time, and the vacuum pump is started to automatically pump the gas in the tank body to the outside when the inflation device is not operated, it is internal to be convenient for fill the jar through the operation with the nitrogen gas in the nitrogen gas jar fast, and auto-switch after aerating device can be operated at every turn, make next time can be accurate collect in the nitrogen gas jar with the internal nitrogen gas suction of jar when bleeding, collect and switch once more after accomplishing, after people open jar body interpolation raw materials, if directly bleed then can take out and discharge the internal air of jar, only bleed next after aerating device fills nitrogen gas and can extract the internal nitrogen gas of jar and store in the nitrogen gas jar, the efficiency of work has been promoted so greatly, people need not to remember the internal portion of jar to be air or nitrogen gas on the end, prevent to take out the internal air mistake of jar in the nitrogen gas jar and cause gaseous pollution, and the operation is simple and fast, the utilization ratio of raw materials is improved, and the use is convenient.

Preferably, aerating device include fixed mounting in device box on the lid, on the device box fixedly connected with the first gas tube that the nitrogen gas jar is linked together, on the device box fixedly connected with the second gas tube that the jar body is linked together, rotate in the device box be connected with the operation ring that first gas tube outer wall rotates to be connected, be equipped with in the device box and be used for rotating automatic during the operation ring will first gas tube with the intercommunication piece that the second gas tube is linked together is convenient for fill the jar internally with nitrogen gas.

Preferably, the communicating piece comprises a device tube fixedly installed in the device box, a first rotating ring is connected in the device tube in a rotating mode, the first rotating ring is fixedly connected with a first rotating tube, a third inflating tube communicated with the second inflating tube is fixedly connected in the device box, a first opening and closing net is fixedly connected on the first rotating tube, a first spring is fixedly connected on the inner wall of the first rotating ring, one end of the first spring is fixedly connected with a second rotating tube rotatably connected with the first rotating tube, a second opening and closing net communicated with the first opening and closing net is fixedly connected on the second rotating tube, a rotating plate is fixedly connected on the second opening and closing net, and a driving groove used for driving the rotating plate to drive the first opening and closing net and the second opening and closing net to be communicated with each other when the first opening and closing net rotates is formed in the first opening and closing net, the operating ring is provided with a rotating part which is used for driving the first opening and closing net to be communicated with the second opening and closing net when the operating ring is rotated, so that the first inflation tube and the second inflation tube can be automatically communicated when the operating ring is rotated.

Preferably, the rotating member includes a second spring fixedly mounted on an outer wall of the operating ring, one end of the second spring is fixedly connected to the device box, the first rotating tube is provided with a first chute, the first chute is internally and fixedly connected with a first spring, the first spring is fixedly connected to a first skewed tooth block slidably connected to the first chute, the inner wall of the operating ring is provided with a first skewed tooth ring clamped to the first skewed tooth block, the second rotating tube is provided with a second chute, the second chute is internally and fixedly connected with a second spring, the second spring is fixedly connected to a tapered tooth block slidably connected to the second chute, the device tube is provided with a tapered tooth groove clamped to the tapered tooth block, the operating ring is provided with a driving member for communicating the second gas tube with the third gas tube when the operating ring is rotated, the first opening and closing net and the second opening and closing net are driven to be communicated when the operating ring is rotated.

Preferably, the driving piece includes fixed mounting in the intraductal third of third inflation is netted in the open and shut, the third inflation pipe with rotate between the second inflation pipe be connected with the fourth that the third was netted in the open and shut, on the operation ring fixedly connected with a plurality of with the side fixed connection's of fourth is netted in the open and shut connecting rod is convenient for make second inflation pipe and third inflation pipe be linked together when rotating the operation ring.

Preferably, the switching device comprises an exhaust pipe fixedly arranged in the device box, a first connecting pipe communicated with the exhaust end of the vacuum pump is fixedly connected to the side surface of the exhaust pipe, the first connecting pipe is communicated with the exhaust pipe, a first through hole communicated with one end of the exhaust pipe is formed in the device pipe, a second connecting pipe communicated with the third inflation pipe is fixedly connected to the device pipe, the second connecting pipe is communicated with the device pipe, a plurality of fan blades slidably connected with the inner wall of the device pipe are fixedly connected to the side surface of the first rotating ring, one end, far away from the device pipe, of the exhaust pipe is communicated with the outside, and a switching piece for switching the exhaust direction of the exhaust pipe is arranged on the exhaust pipe, so that the nitrogen in the tank body can be accurately collected into the nitrogen tank in the air pumping process after the nitrogen is charged every time through the switching piece, manual switching is not required.

Preferably, the switching member includes a second rotating ring and a third rotating ring rotatably connected to the exhaust pipe, the second rotating ring is provided with two symmetrically distributed second through holes, the third rotating ring is provided with a third through hole and a fourth through hole, the connecting rod is fixedly connected with a driving ring rotatably connected to the outer wall of the device pipe, the driving ring is provided with a fifth through hole for communicating the first through hole with the exhaust pipe, the surface of the driving ring is fixedly connected with a first toothed ring, the device box is rotatably connected with a first gear and a second gear, the first gear and the second gear are in transmission connection with a belt, the first gear is engaged with the first toothed ring, the second rotating ring is fixedly connected with a second toothed ring engaged with the second gear, the third rotating ring is provided with a second toothed ring for driving the second rotating ring to rotate at each time, so that the first connecting pipe and the first inflation pipe are driven The other end of the exhaust pipe is communicated and sealed, the third rotating ring is driven to reset after air is extracted every time, and the control piece which automatically exhausts air to the outside is arranged when air is extracted next time, so that the exhaust direction of the exhaust pipe can be conveniently switched.

Preferably, the control member comprises a second skewed tooth block slidably connected with the second rotating ring, a second skewed tooth groove inserted with the second skewed tooth block is formed in the outer wall of the third rotating ring, a first tension spring fixedly connected with the exhaust pipe is fixedly connected to the third rotating ring, a third skewed tooth groove is formed in the inner wall of the third rotating ring, a third spring is fixedly connected to the bottom of the exhaust pipe, a third skewed tooth block inserted with the third skewed tooth groove is fixedly connected to the third spring, a reset member used for releasing the insertion effect of the third skewed tooth block on the third skewed tooth groove after air suction is arranged in the exhaust pipe, the control member is convenient to drive the first connecting pipe to be communicated with the first inflation pipe and close the other end of the exhaust pipe when the second rotating ring is rotated each time, and the third rotating ring is driven to reset after air suction each time, and automatically discharges the air to the outside when the air is extracted next time.

Preferably, the piece that resets include fixed mounting in second extension spring in the blast pipe, fixedly connected with on the second extension spring with blast pipe inner wall sliding connection's sliding block, the sixth through-hole has been seted up on the sliding block, sliding connection has the fixture block in the blast pipe, fixedly connected with on the fixture block with blast pipe fixed connection's third extension spring, the bottom fixedly connected with of fixture block with third skewed tooth piece top fixed connection's stay cord, the bottom of sliding block is seted up and is used for driving the gliding joint groove of fixture block joint is convenient for remove third skewed tooth piece to third skewed tooth groove grafting effect after bleeding at every turn.

Compared with the prior art, the invention has the beneficial effects that:

the invention solves the problem that the prior energy-saving low-temperature lead-free solder paste preparation equipment is difficult to accurately control and recycle the filled nitrogen when in use, and the nitrogen is recycled, through arranging the air charging device and the switching device, the nitrogen in the nitrogen tank can be conveniently and quickly filled into the tank body through operation, and the switching device can automatically switch after operating the air charging device each time, so that the nitrogen in the tank body can be accurately pumped into the nitrogen tank for collection next time during air suction, and then the nitrogen is switched again after collection is finished, after people open the tank body to add raw materials, if air is directly pumped out, the air in the tank body can be pumped out and discharged, and the nitrogen in the tank body can be pumped into the nitrogen tank for storage only after the air charging device fills nitrogen for next time, thus greatly improving the working efficiency, people do not need to remember whether the air or the nitrogen is in the tank body, prevent to take out the internal air mistake of jar and lead to the fact gaseous pollution in the nitrogen gas jar, easy operation is swift, has improved the utilization ratio of raw materials, facilitates the use.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the overall construction of the present invention;

FIG. 3 is a sectional view of the structure of the cartridge of the present invention;

FIG. 4 is a schematic view of the overall internal structure of the present invention;

FIG. 5 is a schematic structural diagram of a switching device according to the present invention;

FIG. 6 is a cross-sectional view of the switching device of the present invention;

FIG. 7 is an enlarged view of area A in FIG. 6;

FIG. 8 is an exploded view of the driving member of the present invention;

FIG. 9 is a sectional view showing the construction of the inflator according to the present invention;

FIG. 10 is an exploded front view of the inflator device of the present invention;

FIG. 11 is an exploded view of the back structure of the inflator device of the present invention;

fig. 12 is a schematic view of a first rotating tube according to the present invention.

In the figure: 1-tank body; 2-a cover body; 3-stirring equipment; 4-nitrogen tank; 5-a vacuum pump; 6-an inflation device; 7-a switching device; 8-a device cartridge; 9-a first inflation tube; 10-a second gas-filled tube; 11-a communication member; 12-a device tube; 13-a first rotating ring; 14-a first rotation tube; 15-a third gas-filled tube; 16-a first open-close net; 17-a first spring; 18-a second rotating tube; 19-a second open-close net; 20-a rotating plate; 21-a drive slot; 22-a rotating member; 23-a second clockwork spring; 24-a first runner; 25-a first spring; 26-a first skewed tooth block; 27-a first helical gear ring; 28-a second chute; 29-a second spring; 30-a bevel gear block; 31-a tapered tooth slot; 32-a drive member; 33-a third open mesh; 34-a fourth open mesh; 35-a connecting rod; 36-an exhaust pipe; 37-a first connection pipe; 38-a first via; 39-second connecting pipe; 40-fan blades; 41-a switch; 42-a second rotating ring; 43-a third rotating ring; 44-a second via; 45-third via; 46-a fourth via; 47-drive ring; 48-fifth through hole; 49-first ring gear; 50-a first gear; 51-a second gear; 52-a belt; 53-second toothed ring; 54-a control member; 55-a second skewed tooth block; 56-a second skewed tooth slot; 59-a first tension spring; 60-a third skewed tooth slot; 61-a third spring; 62-a third skewed tooth block; 64-a reset piece; 65-a second tension spring; 66-sliding block; 67-sixth via; 68-a fixture block; 69-a third tension spring; 70-pulling a rope; 71-a clamping groove; 72-operating ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1 to 12, a method for preparing an energy-saving low-temperature lead-free solder paste is shown, which comprises the following steps:

Referring to fig. 1-2, the illustrated preparation apparatus for the energy-saving low-temperature lead-free solder paste preparation method includes a tank 1, an inflator 6, a switching device 7, and a cover 2 capable of being lifted, wherein the cover 2 is provided with a stirring apparatus 3 for stirring the raw materials in the tank 1, the cover 2 is fixedly connected with a nitrogen tank 4, the cover 2 is fixedly connected with a vacuum pump 5 for pumping air into the tank 1, an air pumping end of the vacuum pump 5 is communicated with the tank 1, the inflator 6 is mounted on the cover 2, used for filling nitrogen in the nitrogen tank 4 into the tank body 1, the switching device 7 is arranged on the cover body 2, for ensuring that the nitrogen gas in the tank body 1 is pumped into the nitrogen gas tank 4 to be stored by starting the vacuum pump 5 after the nitrogen gas charging is performed by operating the gas charging device 6 each time, when the inflator 6 is not operated, the vacuum pump 5 is started to automatically evacuate the gas in the tank 1 and discharge the gas to the outside.

In the embodiment, the cover body 2 is lifted, low-temperature tin-bismuth-silver-copper quaternary lead-free solder powder is weighed according to a proportion and added into the tank body 1, the vacuum pump 5 is started to vacuumize the tank body 1 after the cover body 2 is lowered, then the aerating device 6 is opened to inject nitrogen, the low-speed preliminary stirring is carried out for 5 to 10 minutes, then the vacuum pump 5 is started, the switching device 7 automatically communicates the exhaust end of the vacuum pump 5 with the nitrogen tank 4, the nitrogen recovery can be completed, then the soldering flux is weighed according to a proportion and poured into the tank body 1, the vacuum pump 5 is started to evacuate air automatically when the vacuum pump is vacuumized, the aerating device 6 is opened again to inject nitrogen after the low-speed preliminary stirring is carried out for 5 to 10 minutes, the switching device 7 is automatically switched, the medium-speed stirring is carried out for 25 to 35 minutes, the tin powder and the soldering flux are fully and uniformly mixed, then the vacuum pump 5 is started again to pump the nitrogen out to the nitrogen tank 4 to collect the nitrogen, the nitrogen is carried out in vacuum at a medium-speed stirring period of 5 to 7 minutes, can make solder paste, promote the efficiency of work like this greatly, people need not to remember to the bottom jar body 1 inside be air or nitrogen gas, prevent to take out the air mistake in the jar body 1 and lead to the fact gaseous pollution in the nitrogen gas jar 4, easy operation is swift, has improved the utilization ratio of raw materials, facilitates the use.

Example 2

Referring to fig. 3 for describing embodiment 2, in this embodiment, the embodiment 1 is further described, the inflation device 6 in the figure includes a device box 8 fixedly installed on the cover 2, a first inflation tube 9 connected with the nitrogen tank 4 is fixedly connected to the device box 8, a second inflation tube 10 connected with the tank body 1 is fixedly connected to the device box 8, an operation ring 72 rotatably connected with the outer wall of the first inflation tube 9 is rotatably connected to the device box 8, and a connecting member 11 for automatically connecting the first inflation tube 9 and the second inflation tube 10 when the operation ring 72 is rotated is provided in the device box 8.

Referring to fig. 9-12, a communication member 11 shown in the drawings includes a device tube 12 fixedly installed in a device box 8, a first rotating ring 13 is rotatably connected in the device tube 12, the first rotating ring 13 is fixedly connected with a first rotating tube 14, the device box 8 is fixedly connected with a third inflating tube 15 communicated with a second inflating tube 10, the first rotating tube 14 is fixedly connected with a first opening and closing net 16, the inner wall of the first rotating ring 13 is fixedly connected with a first spring 17, one end of the first spring 17 is fixedly connected with a second rotating tube 18 rotatably connected with the first rotating tube 14, the second rotating tube 18 is fixedly connected with a second opening and closing net 19 communicated with the first opening and closing net 16, a rotating plate 20 is fixedly connected to the second opening and closing net 19, the first opening and closing net 16 is provided with a driving groove 21 for driving the rotating plate 20 to drive the first opening and closing net 16 to communicate with the second opening and closing net 19 during rotation, the operation ring 72 is provided with a rotating member 22 for driving the first opening/closing net 16 and the second opening/closing net 19 to communicate with each other when the operation ring 72 is rotated.

Referring to fig. 4 and 9-12, the rotating member 22 shown in the figure includes a second spring 23 fixedly mounted on an outer wall of the operating ring 72, one end of the second spring 23 is fixedly connected to the device case 8, the first rotating tube 14 is provided with a first chute 24, the first chute 24 is internally and fixedly connected with a first spring 25, the first spring 25 is fixedly connected with a first bevel gear block 26 slidably connected to the first chute 24, an inner wall of the operating ring 72 is provided with a first bevel gear ring 27 engaged with the first bevel gear block 26, the second rotating tube 18 is provided with a second chute 28, the second chute 28 is internally and fixedly connected with a second spring 29, the second spring 29 is fixedly connected with a bevel gear block 30 slidably connected to the second chute 28, the device tube 12 is provided with a bevel gear groove 31 engaged with the bevel gear block 30, and the operating ring 72 is provided with a driving member 32 for communicating the second gas-filled tube 10 with the third gas-filled tube 15 when the operating ring 72 is rotated.

Referring to fig. 8, the driving member 32 shown in the figure includes a third mesh opening and closing net 33 fixedly installed in the third gas-filled tube 15, a fourth mesh opening and closing net 34 connected to the third mesh opening and closing net 33 is rotatably connected between the third gas-filled tube 15 and the second gas-filled tube 10, and a plurality of connecting rods 35 fixedly connected to the side of the fourth mesh opening and closing net 34 are fixedly connected to the operating ring 72.

In this embodiment, when nitrogen gas needs to be filled, the operation ring 72 is rotated to drive the first helical gear ring 27 to rotate and drive the first helical gear block 26, so that the first rotation tube 14 rotates, the first rotation tube 14 rotates and drives the first open/close net 16 to rotate, so that the first open/close net 16 is communicated with the second open/close net 19, at this time, the first spring 17 and the second spring 23 are both compressed, the operation ring 72 drives the connecting rod 35 to rotate and communicate the fourth open/close net 34 with the third open/close net 33, so that nitrogen gas in the nitrogen gas tank 4 can enter the first rotation tube 14 through the first inflation tube 9, flow into the third inflation tube 15 through the first open/close net 16 and the second open/close net 19, and flow out into the second inflation tube 10 through the third open/close net 33 and the fourth open/close net 34, thereby completing an inflation process, after inflation, the operation ring 72 is released, the first spring 17 and the second spring 23 are reset, so that the operation ring 72 is reversely rotated and reset, and simultaneously drives the first rotation tube 14 to drive the first rotation tube 14 to reset, The first mesh opening and closing 16 and the fourth mesh opening and closing 34 are rotated, so that the communication relation between the first mesh opening and closing 16 and the second mesh opening and closing 19 is released, the communication relation between the third mesh opening and closing 33 and the fourth mesh opening and closing 34 is released, and the nitrogen in the nitrogen tank 4 cannot be discharged.

Example 3

Referring to fig. 4-5 and 9-10 for the description of embodiment 3, this embodiment further describes embodiment 1, the switching device 7 in the figure includes an exhaust pipe 36 fixedly installed in the device box 8, a first connecting pipe 37 connected to the side of the exhaust pipe 36 and communicated with the exhaust end of the vacuum pump 5 is fixedly connected to the side of the exhaust pipe 36, the first connecting pipe 37 is communicated with the exhaust pipe 36, a first through hole 38 communicated with one end of the exhaust pipe 36 is formed in the device pipe 12, a second connecting pipe 39 communicated with the third inflation pipe 15 is fixedly connected to the device pipe 12, the second connecting pipe 39 is communicated with the device pipe 12, a plurality of fan blades 40 slidably connected to the inner wall of the device pipe 12 are fixedly connected to the side of the first rotating ring 13, one end of the exhaust pipe 36 far away from the device pipe 12 is communicated with the outside, and a switching member 41 for switching the exhaust direction of the exhaust pipe 36 is arranged on the exhaust pipe 36.

Referring to fig. 5 to 8, the switching member 41 shown in the figure includes a second rotating ring 42 and a third rotating ring 43 rotatably connected to the exhaust pipe 36, the second rotating ring 42 is provided with two second through holes 44 symmetrically distributed, the third rotating ring 43 is provided with a third through hole 45 and a fourth through hole 46, the connecting rod 35 is fixedly connected with a driving ring 47 rotatably connected to the outer wall of the device pipe 12, the driving ring 47 is provided with a fifth through hole 48 for communicating the first through hole 38 with the exhaust pipe 36, the surface of the driving ring 47 is fixedly connected with a first gear ring 49, the device box 8 is rotatably connected with a first gear 50 and a second gear 51, the first gear 50 and the second gear 51 are rotatably connected with a belt 52, the first gear 50 is engaged with the first gear ring 49, the second rotating ring 42 is fixedly connected with a second gear ring 53 engaged with the second gear 51, and the third rotating ring 43 is provided with a belt 52 for driving the first connecting pipe 37 and the first inflation pipe 37 each time when the second rotating ring 42 is rotated The duct 9 communicates with and closes the other end of the exhaust duct 36, bringing the third rotary ring 43 to a position after each suction, and a control member 54 which automatically discharges the air to the outside at the next suction.

Referring to fig. 5-8, the control member 54 shown in the figure includes a second skewed tooth block 55 slidably connected to the second rotating ring 42, a second skewed tooth slot 56 inserted into the second skewed tooth block 55 is formed on an outer wall of the third rotating ring 43, a first tension spring 59 fixedly connected to the third rotating ring 43 and the exhaust pipe 36 is fixedly connected to the third rotating ring 43, a third skewed tooth slot 60 is formed on an inner wall of the third rotating ring 43, a third spring 61 is fixedly connected to a bottom of the exhaust pipe 36, a third skewed tooth block 62 inserted into the third skewed tooth slot 60 is fixedly connected to the third spring 61, and a reset member 64 for releasing the insertion of the third skewed tooth block 62 into the third skewed tooth slot 60 after each air suction is disposed in the exhaust pipe 36.

Referring to fig. 6-7, the reset element 64 shown in the figure includes a second tension spring 65 fixedly installed in the exhaust pipe 36, a sliding block 66 fixedly connected to an inner wall of the exhaust pipe 36 and slidably connected to the second tension spring 65, a sixth through hole 67 formed in the sliding block 66, a latch 68 slidably connected to the exhaust pipe 36, a third tension spring 69 fixedly connected to the exhaust pipe 36 and fixedly connected to the latch 68, a pull rope 70 fixedly connected to a top end of the third helical tooth block 62 and fixedly connected to a bottom of the latch 68, and a latch groove 71 for driving the latch 68 to latch and slide is formed in a bottom of the sliding block 66.

In this embodiment, when the operating ring 72 is rotated to fill nitrogen into the tank 1, the operating ring 72 drives the connecting rod 35 to make the driving ring 47 rotate counterclockwise, the driving ring 47 drives the first toothed ring 49 to rotate so as to drive the first gear 50 to rotate clockwise, the first gear 50 drives the second gear 51 to rotate clockwise through the belt 52, the second gear 51 drives the second toothed ring 53 so as to make the second rotating ring 42 rotate counterclockwise, the second helical tooth block 55 drives the second helical tooth groove 56 so as to make the third rotating ring 43 rotate until the third helical tooth block 62 is clamped into the third helical tooth groove 60, so as to limit the third rotating ring 43, at this time, the third through hole 45 is located in the exhaust pipe 36, and if the vacuum pump 5 starts to pump, nitrogen in the tank 1 is pumped out and discharged into a cavity surrounded by the exhaust pipe 36 and the third rotating ring 43 through the first connecting pipe 37, at this time, the fourth through hole 46 is not located in the exhaust pipe 36, the nitrogen gas in the exhaust pipe 36 cannot be exhausted to the outside, the nitrogen gas in the exhaust pipe 36 flows out through the sixth through hole 67 and flows into the device pipe 12 through the third through hole 45, the second through hole 44, the fifth through hole 48 and the first through hole 38, the fan blade 40 is pushed to rotate counterclockwise in the device pipe 12, so as to drive the first rotating ring 13 to rotate, the first rotating ring 13 drives the first rotating pipe 14 to rotate, the second clockwork spring 23 compresses, the first helical tooth block 26 on the first rotating pipe 14 and the first helical tooth groove slide to continuously push the first helical tooth block 26 to slide into the first sliding groove 24 to compress the first spring 25, the driving groove 21 rotates at a certain angle to push the rotating plate 20, at this time, the first opening and closing net 16 is communicated with the second opening and closing net 19, thereafter, the first rotating pipe 14 continues to rotate to make the first helical tooth block 17 drive the second rotating pipe 18 to rotate, the helical tooth block 30 on the second rotating pipe 18 has a certain limiting effect on the helical tooth groove 31, make second clockwork spring 23 need drive second rotating tube 18 and rotate under the state of compression, thereby guaranteed to stop bleeding the back, first clockwork spring 17 kick-backs and can drive and open and shut 16 and the second and open and shut 19 and carry out the closure with first, nitrogen gas in discharging second connecting pipe 39 in the device pipe 12 can enter into second rotating tube 18 through third gas tube 15 in, net 19 and the first 16 of opening and shutting enter into first rotating tube 14 through the second, store in entering into nitrogen gas jar 4 from first gas tube 9 at last.

It is worth noting that: meanwhile, the air pressure in the exhaust pipe 36 can push the sliding block 66 to slide to one side of the third through hole 45, the second tension spring 65 is stretched, a lifting mechanism is arranged in the fixture block 68, the clamping groove 71 can be clamped into the clamping groove 71 when sliding to the top of the fixture block 68, when the air pressure in the exhaust pipe 36 is reduced after air suction is stopped, the second tension spring 65 is pulled back to drive the sliding block 66 to pull the fixture block 68 to slide together, the third tension spring 69 is stretched, the fixture block 68 pulls the pull rope 70 to enable the third helical tooth block 62 to move upwards to release clamping to the third helical tooth groove 60, the third rotating ring 43 receives the pulling force of the first tension spring 59 to rotate and reset clockwise, the fourth through hole 46 is positioned in the exhaust pipe 36, when the third tension spring 69 is reset, the third tension spring 69 pulls the fixture block 68 from the sliding groove in the clamping groove 71, the pulling force of the fixture block 68 is reduced while the fixture block 68 is reset, the third spring 61 pushes the third helical tooth block 62 to reset while the sliding block is reset, if the vacuum pump 5 is used for pumping, the air will flow out to the exhaust pipe 36 through the fourth through hole 46 and be exhausted to the outside (if the polluted air can be collected and treated by the collecting device).

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The preparation method of the energy-saving low-temperature lead-free solder paste is characterized by comprising the following steps of:

2. The preparation equipment of the preparation method of the energy-saving low-temperature lead-free solder paste as claimed in claim 1, characterized by comprising:

the device comprises a tank body (1) and a liftable cover body (2), wherein a stirring device (3) for stirring raw materials in the tank body (1) is arranged on the cover body (2), a nitrogen tank (4) is fixedly connected to the cover body (2), a vacuum pump (5) for pumping air in the tank body (1) is fixedly connected to the cover body (2), and the pumping end of the vacuum pump (5) is communicated with the tank body (1);

further comprising:

the inflation device (6) is arranged on the cover body (2) and is used for inflating nitrogen in the nitrogen tank (4) into the tank body (1);

the switching device (7) is installed on the cover body (2) and used for ensuring that the vacuum pump (5) is started to pump the nitrogen in the tank body (1) into the nitrogen tank (4) for storage after the inflation device (6) is operated to inflate the nitrogen every time, and when the inflation device (6) is not operated, the vacuum pump (5) is started to automatically vacuumize the gas in the tank body (1) and discharge the gas to the outside.

3. The manufacturing equipment of the energy-saving low-temperature lead-free solder paste manufacturing method according to claim 2, characterized in that: aerating device (6) including fixed mounting in device box (8) on lid (2), device box (8) go up fixedly connected with first gas tube (9) that nitrogen gas jar (4) are linked together, device box (8) go up fixedly connected with second gas tube (10) that the jar body (1) is linked together, device box (8) internal rotation be connected with operation ring (72) that first gas tube (9) outer wall rotated and is connected, be equipped with in device box (8) and be used for rotating automatically will during operation ring (72) first gas tube (9) with intercommunication piece (11) that second gas tube (10) are linked together.

4. The preparation equipment of the preparation method of the energy-saving low-temperature lead-free solder paste as claimed in claim 3, characterized in that: the connecting piece (11) comprises a device pipe (12) fixedly installed in the device box (8), a first rotating ring (13) is connected in the device pipe (12) in a rotating mode, a first rotating pipe (14) is fixedly connected to the first rotating ring (13), a third inflating pipe (15) communicated with the second inflating pipe (10) is fixedly connected to the device box (8), a first opening and closing net (16) is fixedly connected to the first rotating pipe (14), a first spring (17) is fixedly connected to the inner wall of the first rotating ring (13), a second rotating pipe (18) rotatably connected with the first rotating pipe (14) is fixedly connected to one end of the first spring (17), a second opening and closing net (19) communicated with the first opening and closing net (16) is fixedly connected to the second rotating pipe (18), and a rotating plate (20) is fixedly connected to the second opening and closing net (19), the first opening and closing net (16) is provided with a driving groove (21) used for driving the rotating plate (20) to drive the first opening and closing net (16) and the second opening and closing net (19) to be communicated when rotating, and the operating ring (72) is provided with a rotating piece (22) used for driving the first opening and closing net (16) and the second opening and closing net (19) to be communicated when rotating the operating ring (72).

5. The manufacturing equipment of the energy-saving low-temperature lead-free solder paste manufacturing method according to claim 4, characterized in that: the rotating part (22) comprises a second spring (23) fixedly installed on the outer wall of the operating ring (72), one end of the second spring (23) is fixedly connected with the device box (8), a first sliding groove (24) is formed in the first rotating pipe (14), a first spring (25) is fixedly connected in the first sliding groove (24), a first inclined tooth block (26) in sliding connection with the first sliding groove (24) is fixedly connected to the first spring (25), a first inclined tooth ring (27) clamped with the first inclined tooth block (26) is formed in the inner wall of the operating ring (72), a second sliding groove (28) is formed in the second rotating pipe (18), a second spring (29) is fixedly connected in the second sliding groove (28), and a conical tooth block (30) in sliding connection with the second sliding groove (28) is fixedly connected to the second spring (29), the device pipe (12) is provided with a bevel gear groove (31) connected with the bevel gear block (30) in a clamped mode, and a driving piece (32) used for enabling the second inflation tube (10) and the third inflation tube (15) to be communicated when the operation ring (72) rotates is arranged on the operation ring (72).

6. The manufacturing equipment of the manufacturing method of energy-saving low-temperature lead-free solder paste as claimed in claim 5, characterized in that: driving piece (32) including fixed mounting in third open and shut net (33) in third gas tube (15), third gas tube (15) with rotate between second gas tube (10) be connected with fourth open and shut net (34) that net (33) are linked together, on operation ring (72) fixedly connected with a plurality of with side fixed connection's of fourth open and shut net (34) connecting rod (35).

7. The manufacturing equipment of the energy-saving low-temperature lead-free solder paste manufacturing method according to claim 6, characterized in that: the switching device (7) comprises an exhaust pipe (36) fixedly installed in the device box (8), a first connecting pipe (37) communicated with the exhaust end of the vacuum pump (5) is fixedly connected to the side surface of the exhaust pipe (36), the first connecting pipe (37) is communicated with the exhaust pipe (36), a first through hole (38) communicated with one end of the exhaust pipe (36) is formed in the device pipe (12), a second connecting pipe (39) communicated with the third inflation pipe (15) is fixedly connected to the device pipe (12), the second connecting pipe (39) is communicated with the device pipe (12), a plurality of fan blades (40) connected with the inner wall of the device pipe (12) in a sliding mode are fixedly connected to the side surface of the first rotating ring (13), and one end, far away from the device pipe (12), of the exhaust pipe (36) is communicated with the outside, the exhaust pipe (36) is provided with a switching piece (41) for switching the exhaust direction of the exhaust pipe (36).

8. The manufacturing equipment of the manufacturing method of energy-saving low-temperature lead-free solder paste as claimed in claim 7, characterized in that: the switching piece (41) comprises a second rotating ring (42) and a third rotating ring (43) which are rotationally connected with the exhaust pipe (36), the second rotating ring (42) is provided with two second through holes (44) which are symmetrically distributed, the third rotating ring (43) is provided with a third through hole (45) and a fourth through hole (46), the connecting rod (35) is fixedly connected with a driving ring (47) which is rotationally connected with the outer wall of the device pipe (12), the driving ring (47) is provided with a fifth through hole (48) which is used for communicating the first through hole (38) with the exhaust pipe (36), the surface of the driving ring (47) is fixedly connected with a first toothed ring (49), the device box (8) is rotationally connected with a first gear (50) and a second gear (51), and the first gear (50) and the second gear (51) are rotationally connected with a belt (52), the first gear (50) is meshed with the first gear ring (49), the second rotating ring (42) is fixedly connected with a second gear ring (53) meshed with the second gear (51), the third rotating ring (43) is provided with a control piece (54) which is used for driving the first connecting pipe (37) and the first inflation pipe (9) to be communicated and sealing the other end of the exhaust pipe (36) when the second rotating ring (42) rotates every time, the third rotating ring (43) is driven to reset after air suction every time, and air is automatically discharged to the outside when air suction is performed next time.

9. The preparation equipment of the preparation method of the energy-saving low-temperature lead-free solder paste according to claim 8, characterized in that: the control member (54) comprises a second helical tooth block (55) connected with the second rotating ring (42) in a sliding way, the outer wall of the third rotating ring (43) is provided with a second skewed tooth groove (56) which is spliced with the second skewed tooth block (55), a first tension spring (59) fixedly connected with the exhaust pipe (36) is fixedly connected to the third rotating ring (43), the inner wall of the third rotating ring (43) is provided with a third oblique tooth groove (60), the bottom of the exhaust pipe (36) is fixedly connected with a third spring (61), a third oblique tooth block (62) which is spliced with the third oblique tooth groove (60) is fixedly connected onto the third spring (61), and a reset piece (64) used for releasing the plugging action of the third oblique tooth block (62) on the third oblique tooth groove (60) after air exhaust every time is arranged in the exhaust pipe (36).

10. The preparation equipment of the preparation method of the energy-saving low-temperature lead-free solder paste as claimed in claim 9, characterized in that: reset piece (64) including fixed mounting in second extension spring (65) in blast pipe (36), on second extension spring (65) fixedly connected with blast pipe (36) inner wall sliding connection's sliding block (66), sixth through-hole (67) have been seted up on sliding block (66), there is fixture block (68) in blast pipe (36), fixedly connected with on fixture block (68) with blast pipe (36) fixed connection's third extension spring (69), the bottom fixedly connected with of fixture block (68) with third skewed tooth piece (62) top fixed connection's stay cord (70), the bottom of sliding block (66) is seted up and is used for driving the gliding joint groove (71) of fixture block (68) joint.